Messages in this thread | | | From | (Eric W. Biederman) | Subject | Re: [PATCH -mm 5/7] add user namespace | Date | Fri, 14 Jul 2006 09:13:35 -0600 |
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Dave Hansen <haveblue@us.ibm.com> writes:
> On Thu, 2006-07-13 at 21:45 -0600, Eric W. Biederman wrote: >> I think for filesystems like /proc and /sys that there will normally >> be problems. However many of those problems can be rationalized away >> as a reasonable optimization, or are not immediately apparent. > > Could you talk about some of these problems?
Already mentioned but. rw permissions on sensitive files are for uid == 0. No capability checks are performed.
>> Passing a file descriptor between process in a unix domain socket is >> a case where I can easily construct scenarios where there are >> indisputable problems. It is one of my standard thought experiments >> to see if a namespace is sound. > > Care to share some of those indisputable problems?
Already done.
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